zool lab 2

Classification of Cells based on Functions

Classification of Cells based on Structure

Tightly packed sheets of cells

covers all the body surfaces exposed to the outside world and lines the outside part of the organs

flat shape of cell

cube shape of cell

long and thin shape of cell

one layered

two layers

single layer but looks like many due to the difference in length

are composed of closely packed cells with little or no extra cellular space between

connective tissues are disperesed in a ground substance that is often crisscrossed by protein fibers

used for lipid storage and for organ support and insulation

is located in muscle fibers, blood, lymph vessels, and body cavity

can be found in kidneys, back of the eye, adipose (fat), neck and clavicular regions of the body

is located in lymphatic tissue, spleen and liver

▪ can be found in ligaments and tendons

is located in the dermis of the skin

contains collagen fibers that allows the ligament to return to its original length after stretching

Gives arterial walls the strength and ability to regain original shape

is located in the rib cage and nose and covers bones where they meet to from moveable joints

is found in knee joints and intervertebral discs

can be found in the external ear that gives rigid support and elasticity

provides protection to internal organs and supports the body

is located interior of some bones and at the end of long bones

delivers molecules to the blood that could not directly enter the bloodstream

are the most common tissue in the bodies of higher animals

are composed of elongated cells called muscle fibers

are characterized by properties that allow movement

are excitable (respond to a stimulus) and contractile (can shorten and generate a pulling force)

can move voluntarily or involuntarily

sub unit of muscle tissue

involuntary

striated

branched and uninucleated

non-striated, spindle-shaped,

uninucleated

covering wall of internal organs

striated, tubular,

and multinucleated

– chemical processing, production of neurotransmitters

extensions of the soma, receives electrical impulses

sends electrical impulses to the neighboring neurons

insulates the axon

Regulate the chemical environment of the neuron

Nourishes, insulates, and replenishes neurons

helps the sperm to enter the egg

supply proteins to the cell